I just checked your options through the admin panel and the option was still off so I turned it on for you. You should be getting them from now on (but I think that only for posts you make from now on, not on previous threads).
I turned off my email notifications, but I still get them when someone responds to a thread that I had posted in BEFORE I turned off the notifications. In other words it doesn't effect past threads. everytime someone posts to the 'post pictures of your beautiful cats' thread, I get a notification but that is the only semi-active one left for me